Fig. 3: Electromechanical characterization of strain sensors.
From: Sensorized tissue analogues enabled by a 3D-printed conductive organogel
Dynamic testing results (a and b) demonstrated a consistent electrical response up to 300% strain and no baseline drift for a frequency of 0.05 Hz. Horizontal dashed lines have been added to emphasize the lack of signal drift. An example of an extracted ramp test from a (c) revealed a parabolic relationship between the relative change in resistance and strain up to 300% strain. A picture of a strain sensor clamped in the electromechanical testing grips is shown in the inset of c. Cyclic testing up to 100% strain and 0.3 Hz resulted in minimal drift up to 1000 cycles (d), and normalized relative resistance results indicated excellent tracking of the amplitude and frequency of sensor actuation (d, inset).
